Is it obligatory to pray and lead a normal life during menstruation that lasts 11 days, with a subsequent period of purity of 13 or 14 days, and is the day of ritual bathing (ghusl) counted among the days of purity?

Scholars differ on the minimum duration of purity (Tuhr). The majority hold it to be 15 days, while the Hanbalis consider it 13 days.

If bleeding occurs after 13 or 14 days of purity, it is considered a new menstruation (hayd) according to the Hanbalis. Thus, any bleeding experienced by the questioner is considered menstruation as long as it does not exceed 15 days, and any bleeding that occurs after 13 days of purity is considered new menstruation.

The questioner's menstrual period is 11 days, and her period of purity is 13 or 14 days. She should not wait for the completion of 15 days; rather, she should consider the blood as new menstruation if it appears a day or two before that, especially if it is clear bleeding.

A menstruating woman must perform the prayer whose time she became pure within. Delaying the ritual bath (ghusl (definition)) until after the 'Isha prayer is not permissible if she sees one of the two signs of purity: dryness or the white discharge (al-qassah al-bayda'). She must perform ghusl and pray immediately upon seeing either of them.